Sewer appurtenance.



PATENTED MAY 29, 1906.

F. E. SHAW. SEWER APPURI'ENANGE-v APPLICATION FILED MAR. 23

' the vertical axis of said pipes.

STATITES PATENT specification of Letters Patent.

Patented. May 29, 1906.

Application filed March 23, 190] Serial No. 199,617-

To (all whom it may concern.-

Be it known that I, FREDERICK E. SHAW, a citizen of the United States, residing at Proviclones, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Sewer Appurtenances, of which the following is a specification, reference being had therein to the accom anying drawings.

L1 e letters indicate like parts.

Figure 1 is a central vertical longitudinal section of a manhole and its connected sewerpipes, which section is taken in the plane of Fig. 2 is a central longitudinal section of the lower portion of the same as seen on line m of Fig. 1. Fig. 3 is a transverse section of the same as seen on line 2 z of Fig. 1. Fig. 4 is a top plan view of one of the steps by which to descend into the manhole. Flg. 5 is a side elevation of the same. Fi 6 is a top plan view of the inner and outer bands used when the upper and lower sections of the manhole are cemented together. Fig. 7 is a central longitudinal section of a catch-basin embodying my invention.

My invention relates to the class of sewer appurtenances, such as manholes and catchbasins; and it consists of the novel construction'and combination of the several parts, as hereinafter described and specifically set forth in the claim.

Themanhole (shown in Figs. 1, 2, and 3) is made in sections, of which one is designated as A in the drawings and another as B. Each of the sections A and B is made of concrete, formed in suitable molds and dried. A layer of concrete (shown at a) is spread or laid upon the inner wall of the mold, and a piece of wire-netting b is laid thereon. Another layer of concrete 0 is spread upon the wire-netting b and unites with the concrete layer a through the meshes of said netting, thus forming. one homogeneous mass. The outer surface of the concrete layer 0 is shaped against the inner surface of the outer Wall of the mold. Wires d have their inner ends fastened to the wire-netting b and their outer ends are formed into loops. These wires during the molding operation are bent down, as indicated in solid lines in Fig. 1, but after the section A is removed from the mold said wires are bent up, as seen in said figure in dotted lines. The lower edge of the section A is designated as e in Fig. 1. The up er end of the section A has a dome shape and is provided with a central round hole or aperture, into which the annular flange f of the circular cap 0 fits. Upon the upper edge of the cap 0 the cover D fits, which, as usual, is even with the pavements E. The section B of the manhole is tubular and is made of layers of concrete g h, with an embedded piece of Wirenetting i, in a mold adapted for the purpose, in a manner similar to the process already described for the manufacture of the section A. Wire loops 7' extend up from the netting 21, as seen in *ig. 2. The u per edge of the section B is designated as Another section F constitutes the bottom of the manhole and is composed of the inner and outer layers I m of concrete with the embedded piece of Wire-netting n. The bottom F has a diametrical semitubular bend, as seen at o in Fig. 2. Two diametrically-opposite holes are made in the section B next to the bottom F, into which holes, respectively, the sewer-pipes G and H are inserted and there cemented 1n position. These sewer-pipes G and H are re resented as having a lining or armor p in t e lower half of each'oi them. This lining or armormay consist of brick, stone, vitrified baked clay, or other hard durable surface or substance such as is more particularly described in my pending application for Letters Patent, Serial No. 199,616, or, if desired, may be constructed without such lining or armor. In case, however, that such lining or armor is used in theseweripes a similar lining or armor should be user in the concave diametrical groove or channel 0, .as seen at 0 in Figs. 1, 2, and At suitable intervals steps are provided in a vertical line or lines along the inner surface of the sections A and B. Each step consists of a rectangw lar piece or loop R, preferably of cast metal, having a stem and a "if-shaped flange. (Best illustrated in Fig. 5.) Step-holds S, preferably made of cast metal, are approximately til-shaped in cross-section and are embedded in the concrete, as seen in Figs. 4 and 5. They have a downwardly -projecting lL-shaped flange at the upper front edge and a horizontal flange at the lower front edge, as plainly seen in Fig. 5. When the ste R is in posi tion for use, the upper part 0' its T-shaped flange engages with the L-shaped flange of the-step-hold S and the lower edge of the T- shaped flange rests upon the horizontal flange of the step-hold. The step R is detachable, however, as an upward movement of the tread thereof is sufficient to remove its flange from engagement with the step-hold. These sections A, B, and F are set as follows: The section F is first laid in the bottom of the trench in the desired position. The section B is then let down upon the section F by the derrick-chains, which are hooked into the wire loops Then the bottom ed e ofthe section B is cemented to the section Then an annular band T is used, which has an outwardly-flaring flange r. A flexible metallic band U is drawn around the band T, which clamps the band T against the upper portion of the tubular section B at and near the top thereof. The band U is provided with any suitable tightening device, that shown in Fig. 6 comprising a screw-threaded pintongue pivotally mounted in earpieces at one end of the band and projecting into an eye or staple at the opposite end of the band, and a nut engaging with the screw-threads of the pin-tongue. Then a broad flexible metallic band V is used to constitute a temporary annular abutment. This may have any suitable tightening device, the construction shown in the drawings comprising a band made in two sections, each having earpieces mounted thereon at one end and an eye or staple at the opposite end, and a screwthreaded pin-tongue mounted in each earpiece and adapted to enter the staple or eye of the other band-section and to be engaged by a nut in the manner already described concerning the tightening device of the outer band, but, as observable in Fig. 6, the nut .on the band U is engaged with the pin-tongue on the outer side of the staple, so that said band can be contracted or drawn tighter, while the nuts on the sections of the band V are engaged on the pin-tongues on the inner side of the staples, respectively, so that said band V may be expanded. When said bands T, U, and V have been placed, as described, upon the section B of the manhole, and as shown in Fig. 1, the section A is lowered by the derrick-chains, which are hooked into the wire loops d, until the lower edge e of the section A is well within the annular flange r of the band T, as shown in said figure, and the section A is thus kept suspended by the derrick-chains and loops (1 in such position, the lower edge e of the section A being somewhat separated from and distant fronrthe upper edge 7c of the section B and the inner surface of the lower portion of the section A being in forcible contact with the surface of the band V. Cement, mortar, or concrete is then introduced into the annular channel provided by the flange 1' of the band T, which, being moist and plastic, enters the space between the edge e of the section A and the edge k of the section B, and thus fills the interval between them and constitutes a portion of the tubular wall of the manhole continuous with the tubular walls of the sections A and B. When this cement has hardened sufficiently, the derrick-chains are detached from the wire loops d and the bandsT, U, and V are removed.

- In Fig. 7 is shown a catch-basin similarly constructed in two sections A B, the section A having the layers a c of concrete, the intermediate wire-netting b, the wire loops d, and the lower edge e; and the section B having the layers g h of concrete, the intermediate wire-netting i, the wire'loops j, the,

upper edge 7c. The bottom F has a curvature continuous with the tubular walls of the section B and is composed of the layers Z m, of concrete, continuous with the layers 9 h, and the wire-netting n, continuous with the wire-netting i. The sections A B are placed in position and cemented together in the same manner as the sections A and B of the manhole are. A drain-pipe WV is inserted through a proper aperture made therefor in the wall of the section B, and its inner end is inverted to be submerged in the water below the level thereof, as usual. The surface water of the street flows from the pavements E into the gutter and thence through the opening X of the curb Y. C is the circular cap whose annular flange f fits into the hole in the top of the catch-basin, and D is the cover of said cap and lies flush with the surface of the sidewalk Z.

By making these manholes and catch-basins in sections the sections are easily portable and handled.

The mass of cement, mortar, or concrete placed between the edge e of the section A and the edge k of the section B allows the careful adjustment of the top of the section A to the street grade, as the vertical width of the strip of plastic material so introduced between the sections A and B may be varied as is necessary toflgive the manhole the requisite vertical measurements.

If desired, any number of transverse sections may be used in the construction of such sewer appurtenances either to get extra height or depth or to make the sections more easily portable by constructing them of shorter dimensions.

I claim as a novel and useful invention and desire to secure by Letters Patent The sectional sewer structure herein described, consisting of a plurality of transverse sections made of concrete, one of which sections has a curved top or dome and en- In testimony whereof I aflix my signature other of which is cemented to a suitable botin presence of two Witnesses. tom, said sections being united on the con- FREDERICK E AW tiguous edges by a layer of cement or other connecting plastic material forming a Wall Witnesses;

continuous With the Walls of said sections, HENRY N. FRANCIS, substantially as specified. WARREN R. PERoE. 

